Ic Pin Function Description - Sony CFD-E75L Service Manual

CFD-E75L

6-18. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC801 CXP83624-027Q (SYSTEM CONTROLLER)
Pin No. Pin Name
1 CD-WRQ
2 RMC
3 BUZZER
4 N.C
5 CD-RES
6 CD CE
7 CD CL
8 CD DO
9 CD DI
10 CD DRF
11 CD FSEQ
12 V-DATA
13 V-CLOCK
14 N.C
15 MEGABASS
16 A-MUTE
17 N.C
18 CD
19 P-CON
20 CD DOOR
21 REG CHK
22
N.C
23 KEY-1
24 KEY-2
25 JOG-B
26 JOG-A
27
SIMUKE CHECK
28 INIT
29 SHIFT CLK
30 RST
31 EXTAL
32 XTAL
33 VSS
34 VL
35 to 37 VLC3 to VLC1
38 to 41 COM0 to COM3
42 to 61 SEG0 to SEG19
62 to 64 N.C
65 RADIO
66 TU-CE
38
I/O
I Interruption detection signal input from the LC78645NE (IC701)
I Sircs remote control signal input from the remote control receiver (IC804)
O Buzzer sound signal output
O Not used (open)
O System reset signal output to the LC78645NE (IC701) "L": reset
O Chip enable signal output to the LC78645NE (IC701)
O Serial data transfer clock signal output to the LC78645NE (IC701)
I Serial data input from the LC78645NE (IC701)
O Serial data output to the LC78645NE (IC701)
I Focus on/off detection signal input from the LC78645NE (IC701)
I Synchronizing signal detection signal input from the LC78645NE (IC701)
O
Serial data output to the electrical volume (IC320)
O
Serial data transfer clock signal output to the electrical volume (IC320)
O Not used (open)
I Megabass on/off control signal output "L": megabass on
O Audio muting on/off control signal output to the electrical volume (IC320) "H": muting on
O Not used (open)
Power on/off control signal output for the CD +5V power supply, and CD function control signal
O
output to the TA2068N (IC301) "H": CD power on (CD on)
Power on/off control signal output to the power supply circuit, and power amplifier (IC390)
O
"L": standby mode, "H": power on
I
CD lid open/close detection switch (S901) input terminal "H": CD lid is closed
I Regulator check signal input of the AC input or battery input "H" active
O Not used (open)
Key input terminal (A/D input) S401 to S406 (OPERATE, STANDBY, RADIO BAND AUTO
I
PRESET, TUNE m –, TUNE M +, DSPL ENT MEM) keys input
Key input terminal (A/D input) S407 to S413 (MENU ALARM, x, u, VOLUME –,
I
VOLUME +, MEGA BASS, MODE) keys input
I Jog dial pulse input from the rotary encoder (RE401 JOG DIAL) (B phase input)
I Jog dial pulseinput from the rotary encoder (RE401 JOG DIAL) (A phase input)
I Destination setting terminal
O Initial setting signal output
O Shift clock output of the main system clock (4.19 MHz) "H" active
System reset signal input from the reset signal generator (IC843) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I Main system clock input terminal (4.19 MHz)
O Main system clock output terminal (4.19 MHz)
— Ground terminal
O Liquid crystal display drive bias control signal output terminal
— Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
O
Common drive signal output to the liquid crystal display (LCD801)
O
Segment drive signal output to the liquid crystal display (LCD801)
O Not used (open)
O
Power on/off control signal output for the radio +6V power supply "H": radio power on
O PLL chip enable signal output to the FM/AM PLL (IC2)
Description